86 BRITISH LEPlfrOPTERA. 



shape of the forewings, which are more pointed, and the outer margin, instead 

 of being curved, forms a straight oblique line, and is, in fact, bent slightly inwards 

 medially. I am unaware whether this is an individual peculiarity or whether it is 

 always present in var. lapponica ? . That the wing-form of quercus varies in 

 different localities is shown by my js of var. sicula, the forewings of which are 

 narrower and not so round as those of typical quercus ; var. lapponica has them just as 

 broad but not so round as those of the typical form. Otherwise, var. lapponica ? , 

 like that of var. tenuata, is one of the dark forms. Its colour is darker yellow-brown than 

 the darkest of my Oberursel females. The broad transverse band is brighter yellow, 

 which makes it more prominent on all four wings. The fringes of the forewings are 

 lighter than in L. quercus, those of the hindwings are pure yellow (Fuchs). 



o. var. olivaceo-fasciata, Cockll., ' Entom.," xxii., p. 3 [with reference to 

 "Ent.," xi., p. 103 (1889)]. Quercus, Frohawk, " Ent.," xxxiii., pi. hi., 

 fig* 8 (1900). — Lasiocampa quercus olivaceo-fasciata, Entom, xi., p. 103, due 

 to development of green pigment ; probably the change in the Lasiocampa represents 

 the excessive metabolism which normally only attains the brown and black stages 

 (Cockerell). The reference {Entom. , xi., p. 103) simply reads : " Messrs. Porritt 

 and Varley showed .... an olive-banded variety of Lasiocampa quercus 

 from Huddersfield." 



This aberration was first figured by Engramelle (fig. 225^) 

 from Gerning's collection, and is described as having " the band- 

 elette greenish." Borkhausen speaks of this (Sys. Besch., hi., p. 

 464), and Guenee also refers to it (Ann. Soc. Ent. France, 1858, 

 p. 441). Edleston observes (Zool., xviii., p. 6815) that he has two 

 olive-brown examples ( $ and $ ) from Carrington Moss. Gregson 

 notes (Ent., iv., p. 13) a female, of a dark olive-green-brown, with- 

 out any markings whatever upon it except a faint indication of the 

 central light spot. Porritt writes (i.l.) that he bred, on July 1st, 

 1873, from a single larva picked up on Crosland Moor, nr. Hudders- 

 field, in 187 1 (or 1870), the pupal stage lasting two (or three) years, 

 a 6* of rich chocolate - brown colour, with the bands on all the 

 wings and the margin of the hindwings clear olive-green, though 

 the olive -green extends over a wider area than the yellow in 

 ordinary specimens. By 1883, Porritt noted (List. Yorks. Left., p. 

 29) that two or three others had been bred. Walker notes that, 

 from a Crosby larva taken in 1880 which wintered as a pupa, a £ 

 was bred with the basal half of the upper- and underwings of a 

 dark chocolate-brown banded by a median line of a darker shade. 

 Beyond the outer margin of this line lies a broad band of dark 

 olive-green, which gradually merges into the ground colour. The 

 spot in upperwing pure white. Pearce records (Entom., xv., p. 

 254) that, on July 28th, 1882, a $ emerged at Portsmouth of a deep 

 chocolate colour, with the usual white spot in the centre of the 

 forewings ; the stripe across both pairs of which is narrow and of a 

 deep green colour, and the fringe of the underwings is of the same 

 colour as the stripe. The larva was black, with the usual white 

 markings ; the cocoon was also black. Porritt again notes (id.) 

 another $ and $ from Rhombald's Moor in 1893, the 5 bred, and the 

 male obtained by assembling ; another £ is recorded by Porritt as 

 bred in June, 1894, from a Huddersfield larva, with a deep chocolate 

 band very fairly tinted with dark olive. Tunstall records breeding 

 in June, 1898, from a larva obtained on Royd's Edge Moor, nr. 

 Huddersfield, a dark chocolate $ with the band very faintly traced 

 in dark olive; and Porritt states that yet another J is recorded 

 from Norland Moor, some five miles from Huddersfield in another 

 direction. Hewett has three $ specimens all from Rhombald's 

 Moor in his collection, taken by ''assembling," and says that the 



